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      07-08-2018, 03:45 PM   #1
P416
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Exclamation Help E90 Error Code P0303 Cylinder 3 Misfire

Hey I have a BMW E90 2011 323i. Yesterday my car started misfiring and stumbling while stopped. Engine light turned on I got the code P0303 Cylinder 3 misfire. I ordered spark plugs online from germanparts.ca

This is what i purchased: BOSCH FR7NPP332 (OEM#12122158253)
https://order.germanparts.ca/parts/b...2.5l-24v/2329B

According to realoem.com my car came with (OEM#12120035915)

Now I'm thinking if I ordered the wrong plugs and if I shouldve bought NGK PLZFR6A11S (OEM#12120035915) instead:
https://order.germanparts.ca/parts/b...2.5l-24v/1329B

Will the ones I purchased fit my car even tho it has a different OEM#?

Please advise,
Thank you.

Last edited by P416; 07-12-2018 at 12:45 AM.
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      07-08-2018, 04:17 PM   #2
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Same car and same situation... BOSCH FR7NPP332 Spark Plugs for almost 2 years with no problems at all.
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      07-08-2018, 04:34 PM   #3
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Quote:
Originally Posted by Bmwner View Post
Same car and same situation... BOSCH FR7NPP332 Spark Plugs for almost 2 years with no problems at all.
Thanks! I almost emailed germanparts if it's possible to cancel my order if it hasnt shipped yet. I will give that product a try.
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      07-08-2018, 08:46 PM   #4
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Code P0303 Cylinder 3 misfire, might be injectors more then plugs.

I had codes just a few weeks ago
P0301
P0300
P0304

Injectors were all replaced, no more issues.

Just a heads up that it might not be or could be more then plugs alone.
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      07-08-2018, 08:56 PM   #5
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Quote:
Originally Posted by The Geezer View Post
Code P0303 Cylinder 3 misfire, might be injectors more then plugs.

I had codes just a few weeks ago
P0301
P0300
P0304

Injectors were all replaced, no more issues.

Just a heads up that it might not be or could be more then plugs alone.
If its the injector do i have to replace all of it or just the one that failed?
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      07-08-2018, 09:01 PM   #6
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I replaced all of mind due to older index, if you got Index 5 index 8 or index 9 you should replace them all with index 11 or 12.

Old rule of thumb, once one goes the others will follow at some point. Just my 2 cents worth.

But yes you can just change the one injector if thats your only option.

I am not sure about yours, but mine new OEM from BMW were about $350 each, I ended up getting new/used ones for $75 each
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Last edited by The Geezer; 07-08-2018 at 09:42 PM.
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      07-10-2018, 11:21 AM   #7
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Quote:
Originally Posted by Bmwner View Post
Same car and same situation... BOSCH FR7NPP332 Spark Plugs for almost 2 years with no problems at all.
Hey man shop just emailed me and said that the spark plugs are not compatible with a 2011 323i

"that part number doesn’t match with your car. My software is giving me a part number of 12120037663 for plugs"

Can you confirm if you have the Bosch #12122158253

Thanks

Last edited by P416; 07-10-2018 at 11:33 AM.
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      07-10-2018, 06:04 PM   #8
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i found one of the boxes...
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      07-10-2018, 06:17 PM   #9
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Quote:
Originally Posted by Bmwner View Post
i found one of the boxes...
Not sure why the shop said it's not compatible.
Does it need to have the same OEM#?

My car came with OEM#12120035915

I ordered Bosch OEM#12122158253
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      07-10-2018, 06:27 PM   #10
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Quote:
Originally Posted by P416 View Post
Not sure why the shop said it's not compatible.
Does it need to have the same OEM#?

My car came with OEM#12120035915

I ordered Bosch OEM#12122158253
I bought these Bosh because i saw them on Germnparts.ca and so fr so good. Did Germanparts confirm fitment ? . If you're not sure , I would say return them and order the NGK plugs .
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      07-11-2018, 01:32 PM   #11
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Quote:
Originally Posted by Bmwner View Post
I bought these Bosh because i saw them on Germnparts.ca and so fr so good. Did Germanparts confirm fitment ? . If you're not sure , I would say return them and order the NGK plugs .
BMW dealer emailed me

"The spark plug you list is for the same car but different production date. I need your vin to give you the correct info."

"(OEM#12120035915) substitutes to (OEM#12122158253) so technically they are the same part"

He said that I have the wrong plugs unless the NGK crosses to the Bosch.

and I'm still confused. I'm looking at realoem.com both #12120037663 NGK & #12122158253 was both found on a E90 LCI 2007-2011

and it says Supersedes:
12120032138 NGK (09/01/2004 - 12/15/2009) What does that mean?

Last edited by P416; 07-11-2018 at 05:53 PM.
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      07-12-2018, 07:44 PM   #12
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Quote:
Originally Posted by P416 View Post
BMW dealer emailed me

"The spark plug you list is for the same car but different production date. I need your vin to give you the correct info."

"(OEM#12120035915) substitutes to (OEM#12122158253) so technically they are the same part"

He said that I have the wrong plugs unless the NGK crosses to the Bosch.

and I'm still confused. I'm looking at realoem.com both #12120037663 NGK & #12122158253 was both found on a E90 LCI 2007-2011

and it says Supersedes:
12120032138 NGK (09/01/2004 - 12/15/2009) What does that mean?
to be honest, im confused and dont know what to tell u. The bosch spark plugs work. I mean, no misfires, no warning lights , no problems at all. I did not even notice any difference between those and the OEM S/P.
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      07-12-2018, 07:50 PM   #13
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Quote:
Originally Posted by P416 View Post
Hey I have a BMW E90 2011 323i. Yesterday my car started misfiring and stumbling while stopped. Engine light turned on I got the code P0303 Cylinder 3 misfire. I ordered spark plugs online from germanparts.ca

This is what i purchased: BOSCH FR7NPP332 (OEM#12122158253)
https://order.germanparts.ca/parts/b...2.5l-24v/2329B



According to realoem.com my car came with (OEM#12120035915)

Now I'm thinking if I ordered the wrong plugs and if I shouldve bought NGK PLZFR6A11S (OEM#12120035915) instead:
https://order.germanparts.ca/parts/b...2.5l-24v/1329B

Will the ones I purchased fit my car even tho it has a different OEM#?

Please advise,
Thank you.
Check your coils same thing happend to me..

Last edited by Bmw_Crazy; 07-12-2018 at 07:56 PM.
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      07-13-2018, 09:04 AM   #14
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When did the check engine light come on to let you know you had a issue?

If it was under under load (while driving) would be a coil issue most likely.

If it was from cold start would be a fuel injector issue most likely.
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      10-09-2018, 06:39 PM   #15
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Quote:
Originally Posted by The Geezer View Post
I replaced all of mind due to older index, if you got Index 5 index 8 or index 9 you should replace them all with index 11 or 12.

Old rule of thumb, once one goes the others will follow at some point. Just my 2 cents worth.

But yes you can just change the one injector if thats your only option.

I am not sure about yours, but mine new OEM from BMW were about $350 each, I ended up getting new/used ones for $75 each
Hi, I'm counting myself lucky to stumble upon your post because I'm running into the exact same situation as you have.

I also drive a E90 335xi ('09 sedan) and my injectors are due to be replaced because they are leaking and they are low index #s. I'm applying that rule of thumb and I'm preparing to have all 6 upgraded to index 11 or 12, any chance you could please refer me to your supplier?
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      10-10-2018, 04:26 PM   #16
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i got mine from a friend that works for BMW.
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      10-15-2018, 07:09 AM   #17
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These engines are famous for coil failure. I would doubt the plug would fail but its probably the coil. Best way to check is to unplug the coil and see if there is any change in engine rpm. Also take off the coil of cylinder 3 and switch it to another cylinder like #1 since its easiest, and you will probably now have a cylinder 1 misfire.
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